Fuel tank cap



FIG. 1 is a front and top perspective view of a fuel tank cap, showingmy new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is another perspective view thereof, shown in an alternativeposition.

The broken lines in the figures illustrate portions of the fuel tank capthat form no part of the claimed design.

CLAIM The ornamental design for a fuel tank cap, as shown and described.